1. Electrical and Computer Engineering, University of Connecticut, 371 Fairfield Way, U-4157, Storrs, CT, 06269-4157, USA
2. Department of Physics, Gebze Technical University, Microwave Lab., Gebze Technical University, Gebze, Kocaeli, 41400, Turkey
3. Polymer Science and Technology Department, Istanbul Technical University, ITU Ayazaga Campus, Maslak, Istanbul, 34496, Turkey